Machine for making stereotype printing-plates.



C. EJ'HOPKINS.

MACHINE FOR MAKING STEREOTYPE PBlNTlNG LATES APPLlCATlON FILED FEB. 25. um. RENEWED iUNE w 911 1,286,323.

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MACHFNE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLICATION FILED FEB. 25. 1911. EENEWED JUNE 14. 1917.

Patented Doc. 3, 1918.

4 SHEETSSHEET 2- C. E. HOPKINS. MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLlCATlON HLED FEB. 25, 1931. RENEWED JUNE 14'. 1912.

1,286,323. Patented Deg. 3, 1918.

I4 SHEETS-SHEET 3- 6' M 9 wing:

1.6mm I SWSHW C. E. HOPKlNS.

MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLICATION FILED'FEB. 25, Ian. RENEWED JUNE 14. 19!].

14 sHEETs-SHE T 4 Patented Dec. 3

C. E HOPKINS MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

. APPLICATION FILED FEB- 25. I91)- RENEWED JUNE I4. 1917- 1,286,323. Patented Dec. 3, 1918.

I4 SHEETS'SHEET 5.

C. E. HOPKINS. MACHINE FOR MAKING STEBEOTYPE PRlNTING PLATES.

APPLICATION FILED FEB. 25, 19H. RENEWED JUNE 14. 1917- 1,286,323.

C. E. HOPKINS.

MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLICATION FILED FEB- 25. NHL RENEWED JUNE 14' IBIY. 1,286,323.

14 $HEETSSHEET I.

Patented Dec. 3, I918.

C. E. HOPKINS.

MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

AiiPLICATlON FILED FEB. 25. 1911. RENEWED JUNE 14. 1917.

1 286,323. Patented Dec. 3; 1918.

14 SHEETS-SHEET 8.

6 5170I0/4Ia1.

C. E HOPKINS.

MACHI NE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLICATION HUED FEB. 25. 191:. RENEWED JUNE 1-1' 1911.

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Patented Dec.3, 1918.

14 SHEETS-SHEET 9.

War/v91 C. E. HOPKINS.

MACHINE FOR MAKING STEREO'IYPE PRINTING PLATES.

APPLICATION FILED FEB. 25. Ian. RENEWED JUNE 14. I9I7.

1,286,323. Patented Dec. 3, I918.

14 SHEETS-SHEET l0.

II I/ I ZZ Q' fx/ MACHIN APPLICAT C. E! HOPKIN E FOR MAKING STEREO NTING PLATES.

ION FILED FEB. 25, 1911. 5 0 was 14 1917.

Patented Dec. 3, 1918.

I4 SHEETSSHEET 11.

C. E, HOPKINS.

MACHINE FOR MAKING STEREOTYPE PRINTING PLATES.

APPLICATION FILED FEB. 25.1511. RENEWED JUNE 14, 191]. 1,286,323.

Patented Dec. 3, 1918.

14 SHEETSSHEET I2.

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MACHINE FOR MAKING STEREOTYPE PRINTING-PLATES. APPLICATION FILED FEB. 25. 19H. RENEWED JUNE 14 1911.

1,286,323. Patented Dec. 3, 1918.

14 SHEETS-SHEET I3.

HOPKINS.

MACHINE FOR MAKING STEREOTYPE PRiNTlNG PLATES.

APPLICATION FILED FEB. 25. \911. RENEWED ME 14. 1911. 15286323.

Patented Dec. 3, 1918.

H $HEETS-SHEET I4.

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& EM .8. mad 14h UNITED $TATE$ PATEN f CHARLES E. HOPKINS, OF TAUNTON, MASSACHUSETTS.

MACHINE FOR MAKING STEREOTYPE PRINTING-PLATES.

Application filed February 25, 1911. Serial No. 610,834. Renewed. June To all whom it may concern:

Be it known that 1, CHARLES E. IIOPKINS, a citizen of the United States, residing at Taunton, in the county of Bristol and State of Massachusetts, have invented a new and useful Machine for Making Stereotype Printing-Plates, of which the following is a specification.

My invention is for the purpose of pro ducing semicircular curved stereotype printing plates for use on the cylinders of rapid printing or rotary presses, particularly such as are in common use in producing newspapers, and is designed mainly as a labor saving device whereby one man by manipulating certain handles and levers will be able to produce the stereotype printing plates completely finished and cooled so they can be handled by the bare hands in condition to be immediately attached to the printing press cylinder; also to provide means whereby, through 'the control of the contraction of the curved printing plate during the process of cooling, the operator will be able to produce plates of various curvatures or dimensions from the same 'asting chamber and further, through the control of the cooling liuid, deliver the plates practically dry and ready to be attached to the press cylinders.

More specifically the invention comprises a practicable arrangement whereby the plate is cast vertically between a stationar back and a movable core in such a way that the core can be turned down from the stationary back to deliver the cast plate therefrom; to provide simple means whereby the plate is automatically lifted from the convex surface of the core when the latter is moved to position for delivery; to provide a construction in which the core is moved from the vertical casting position to a horizontal position and further swung over to an inclined position from which the casting can slide endwiso with the aid of gavity; to provide means of a simple character whereby not onl are the casting box and core cooled during casting, but also the cooling of the core continues after casting and while it is being swung over to inclined position. and in fact all the time; to provide means whereby the latter cooling operation is caused by water circulating in the core While connected with a Water supply system and re- Speeifieation of Letters Patent.

Fatented Deco 3, 1918.

1 1-, 1917. Serial No. 174,794.

tained therein if such connection is closed; to provide means whereby matrix clamps on the back can be swung out and in at the proper time so as to clamp the matrix when the casting operation is to he performed, and to unclamp it when required these means being so constructed that the matrix is released before the cast plate moves out; to provide an improved construction. of bottom ring support for supporting the core; to provide means whereby a bevel is cast on one end of the plate close to the type face of the matrix with a clean sharp'edg'e so as to do away with the necessity of mechanical finishing thereof; to provide the movable core with means for forming projections on the cast plate on the concave surface of the riser portion for use in positioning the plate in the finishing mechanism; to provide the top of the mold with a wide opening for tne entrance of metal and with means for preventing the over-flow of the metal over the tail-ring and other mechanism; to provide an improved adjustable tail-sheet for the core to overlap the holster of the matrix so as to prevent metal from entering behind the latter; to provide a construction whereby the tail-sheet can be turned away from the top of the core when the core is turned over out. of the casting box; to provide automatic locking means for preventing turning of the core unless the tail-sheet and, its ring are in casting position thereon: to provide simple and effective guiding; means for guiding the core to and from its positionin the back; to provide for supporting the'core near its center of gravity so as to have the core so balanced that the thick top end of the stereotype plate cast on it will over-balance it and assist in turning it out of the casting box to its horizontal position, but without a stereotype plate the core will have .a tendency to turn by gravity to the vertical position in the back; to provide movable means for assisting in this result: to provide simple and convenient means for autonnitically locking the core in casting position; to provide this locking means of such construction that the core can be guided into casting position or out and that after it is in casting position the operating means can be further operated without moving the' core so as to permit of the opening of the ill ill?

the in:

t all matrix: lamps; to provide matrix clamps with pivo jaws which. automatically open and close; to provide means operated by the-movement of the core to positively opthe matrix clamps to release the v and swing out of the path of the r. the stereotype plate on the core; to vide means whereby when the core is moved into the hack the side bars are forced solidly against. the edges of the matrix supporting hack and for positioning the core and alining the edge of the p ate lifters in the casting chamber with the edges of the matrix holding jaws of clamps; to provide means withthe control of the operator for closing the matrix clamps and for opening them vvi. int turning the coreflto provide means for preventi the core being turned into casting pof n while the matrix clamps are open and for automatically releasing this means when tl'ley are closed to casting positionyto provide simple and convenient mechanism in aliiilement with the core when it rec final open position for receiving the plate therefrom, shaving the ribs cast on the concave surface of the plate. cutting or the riser, bcveling the riser end. gradually lowering and finally dropping the tail cut oil, releasing the plate and allowing it to be fed by gravity from the.

finishing mechanism to a final cooling mechanism; to provide simple and effective means for receiving the plate from the finishing mechanism and cooling it in such a. way as to control the contraction. of the plate daring the cooling process so that piates hoth of less or of greater diameter can he provided from the same casting chamher; also to provide for controlling the cooling water: so that the plate can be de livered dry and ready for the press cylin ders.

The invention also involves numerous improvements in details of constructon and in mechanism for carrying out the oloiects else where ecilied herein. Further ohiects and admittance of the invention will appear hcreiii after.

lie erence is to he had to the-accompany inp' drawin in which Figure 1 is a side elevation of a complete machine constructed in accordance with this invention Fig. a:'

with;

F 1g. scetiona view on the line l-4 of of the mold showingthc parts for receiving the casting therefrom in plan, but with matrix clamp omitted;

Fig. 4* is an end view of some of the delines, and also showing the open position in dotted lines;

Figs. 6 and 7 are two enlarged vertical sectional views through one side of the core showing the plate lifter before and after it lifts the plate;

Fig; 8 is a central vertical sectional view of the casting box with a cast plate therein;

Fig. 9 is a horizontal sectional view taken on the line 99 of- Fig. 11. showing the tilted bottom ring in plan;

Fig. 9 is a longitudinal sectional view of one of the matrix clamps;

Fig. 10 is a vertical sectional view on the line 10-10 ,of Fig. 4, of the mold and core separated with the tail ring closed and the cast plate delivered over but free from the core;

Fig. 10 is a section through the core turning shaft of Fig. 10 with the core in an intermediate position;

Fig. 10 is an edge view of a detail;

Fig. 11 is a side View of the mold showing the matrix holders when the core is moving back into casting position;

Fig. 12 is a horizontal sectional view on the line 12-42 of Fig. 11, on enlarged scale of the one edge of the back showing one of ing how the cast plate is supported on the lifter;

Fig. 19 is a sectional view on the line 1919of Fig. 14.;

Fig. 20 is a sectional view on the line 20-20 of Fig. 14;

Fig. 21 is a diagrammatic sectional view' of the same on reduced scale showing one position of the parts during the finishin operation Figs. 23, 24; and 25 are similar views showing other positions of the same parts;

Fig. 26 is a side View of the cooling apparatus;

Fig. 26 is a fragmentary detail thereof;

Fig. 27 is a sectional view of-the same on the line 27-27 of Fi 1;

Fig. 28 is an enlarge sectional. view on the same line showing how the plate is held during one tion;

Figs. 29 and 39 are similar views showingother positions of ie plate;

Fig. 31 is an end view of one of the rollers for supporting the plate with parts in section; and

edge of the period of the opera- Fi 32 is a transverse sectional view on u n", n 1 l i.1v Q14- I i. Z10. tle ir v 39 or g In order to get a general idea of the invention it may be st. ted that the dra' inns, particularly Fig. 1. show a machine cinbodying the following elements. 's'iainel a melting furnace and pump t or" any desired construction for delivering metal in measured quantities to a segmental back B refer-ably located in vertical position on a ase or frame C, also a convex core D constituting with the back the lateral walls oi the casting box. but capable of moving out of the back with the east plate thereon. and delivering the plate to a finishing mechanism E which in turn delivers it to a cooliimde vice F. The base and the base G of the cooling evice support a frame ii on which the finishing mechanism is mounted. .1 motor K is shown for the purpose of'opersting certain of the parts as will appear ereinafter.

The casting mechanism as shown is composed of the base C upon which is mounted in a vertical position the segmental or con cave hollow matrix supporting back P). The, matrix supporting: back is provided with a chamber l'n'ivingg an opening;' at the bottom in which is connected a water supply pipe. 40. for the purpose of keeping; the said back cool and thereby a. st in apidlv solidifying" the stereotype cast. An outlet 41 is located at the top for the discharge of the water. Near each straight edge 4-? 12) of the back are pivoted improved matrix clamps com prising 56 supported by upright shafts 4% loosely mounted in bearings-+35. fixed to the sides of said back. Fastened on the said shafts are short links 46. the movable ends of which are pivotally attached by studs 47 to locking slides 48 having; beveled ends 49. Said slides are arranged on the exposed sides of matrix bars 50 and 51 which are, pivoted on the said upright shafts by hinges 52, and on the opposite sides of the said matrix bars are reciprocating bolster packing strips 53 and a sheet metal covering 54. Said lock-- ,ing slides and bolster 'iaeking' strips are held together by studs 55 which operate in slotted holes through the matrix bars. At the opposite edge. of the matrix oars 50 and 51 from that by which they are pivoted to the upright shafts. are the matrix jaws 56. They are pivotallv mounted on rods 57 and are held normally away from the matrix bars and against the beveled ends of the locking slides by spring actuated plunger 58, extending through the edges of said bars and engaging the adjacent sides of the jaws. The matrix bars are beveled oil at their outer edges at 59 to accommodate this motion of the jaws. I

Mounted on one of the jaws 56 are a series of tubes 60. which are closed on one end and have within spring actuated plnngers 61, each of which pluugers extends through an opening (32 leading: into a slot (l3'tornied in the said jaw for the entrance of the matrix bolster. These plungers are positioned so as to engage the edge of the matrix bolster as the matrix clamps are turned into closed position against the edges at the back and the plun rers 61 will push the matrix toward and solidly in the slot of the opposite jaw. By this :ranp'emenl of the matrix jaws 56. the actoi turning the shafts causes the mai'rix bars 50. 51 to turn toward. and their bolster packing strips 5? to engage. the straight sides 42 turning movement of the shaft moves the beveled ends l9 of the locking slides-l8 toward and over the hinged jaws 56. This is a cam motion which causes the said jaws to turn on their hinges. it the same time the bolster PllClCllig strips and covering strips 54. on the opposite sides of the matrix bars. move inwardlv until the strips engage the bolster of a matrix posilioi'ied in the matrix supporting back. The matrix jaw opposite the one. with plungers is provided with a lip 64 (Fig. 9) which extends in the casting chamber and forms a groove alon; that straight edge of the cast For a pnrposr hereafter described. The matrix jaws 50 arc of a length equal to the type 'lace portion of the matrix. But the packing strips 53 are. the full length of the matrix which includes the bolsters. The two matrix clamps as just described are connected b v short arms 67 (Fig. 4) attached to the lower ends of the u 'irigjht shafts and a rod 68, extending across from one to the other of said arms: through these links and rod both matrix clamps move in unison. The shafts are oscillatal'ile by means to be described here inafter.

At the bottom of the ternally alined with the concave surface of the. matrix supporting back is a concavoconvex semi-circular ring 70 (Figs. 8 and 10). it is tastcnedto a support 71. which is mounted on a rock shaft 72 extending across and pivoted in bearings in the base. The ring 70 has its top edge beveled downward at 2'0 toward the concave side and its convex side formed with a recess 73 in which the lower bolster of the matrix enters when the ring is turned and engages the concave surface of the matrix supporting back as hereafter explained. However, the bevel is formed only on that portion of the ring ex tending between the matrixjaws, the balcastine' box and inof the back. and a further the frame: To the ring 70 are fixed matrix supports, 76, which enter recesses 77 in the lower edge of the matrix supporting back and close into said recesses when the ring is turned into position against the concave back. The concave surface of the matrix supporting back is provided with a raised rib 79 extending the length of the curve and located so as to support the lower bolster of a matrix. The top portion of the rib is made convex so as to fit the back curvature of the bolster where the said bolster joins the type face. The recess 73 of the end ring is provided with a like concave at the top so as to fit the front of the opposite side of the bolster and the top edge of the said ring is made slightly flat. By this means I am able to cast the bevel close to the type face of the matrix and at the same time produce a clean sharp edge on the cast and thereby do away with the necessity of any mechanical finishing of that curved edge of the stereotype plate.

Supported on tracks 80 on supports 78 on the base C, and in front of the concave side of the matrix supportingback is the semicylindrical core I), which is made to oscillate or turn from about 9 degrees beyond horizontal to a vertical position within the concave back and return. Guides 81 on the core engage the outer surfaces of the tracks. The core, like the matrix supporting back, is made hollow, and is provided with a water distributing chamber 82, at one end for the purpose of equal distribution of coldwateras it enters the cooling chamber back of the casting surface of the core. The water is supplied from the pipe 10 to the distributing chamber through a flexible tube 83 connected to an opening leading into the said chamber. Near the top of the core is a discharge opening in which is connected a pipe 8 1 and to which pipe is attached a flexible tube 85 connecting in turn with a stand pipe 86, located at one side'of the base; by this means the cooling water freely circulates, and owing to the stand pipe, the core is constantly kept filled with water which cools the core and thereby quickly solidifies the cast.

Suitable valves 87 for regulating the How of water through both the core and back are provided and positioned so the operating handles are located directly in front of the operator and of the base O.

In the face of the core D are made the HSUZLI'I'QCGSSBS'SS which form ribs P on the the cast in the finishing mechanism E, hereafter described.

The top of the core is beveled at 90 so as to form a wide opening for the entrance of metal and to prevent the overflow of the metal over the tail ring 97 The tail P is cast in a recess (Fig. 29). A recess 92 is made along the bevel on the upper edge of the 'core beneath which a receiving pan .93 is located to catch any overflow and prevent it running on the core turning mechanism.

Attached to each of the straight sides of the (:01'6 D, (Figs. 6 and 11 by sales at; are plate lifting bars 96 on which. are

mounted lifter plates 95, which form with the hinged matrix jaws 56, the edgewalls of the casting chamber. Hinged to the upl per end of one of the plate lifting bars is the adjustable tail ring 97 with arms 98 extending lengthwise of the core, shown blosed in Fig. 10. This ring and arms form with the thin metal sheet 99 fastened thereto, what is known as the pouring of tail sheet,

which when inposition in the back overlaps the top bolster of the matrix, thereby preventing metal from entering behind the matrix, when pouring a cast. To the op posite side of this ring from the hinge is fixed a handle 100 by which the ring can be turned away from the top, of the core, when the core is horizontal, and against a support 101 on the finishing frame H (Figs. 1 and 5). During this turuing1notion of the ring away from the core a hook 102 fastened to a hinge 104-. of said ring moves under a catch 103 attached to the frame of the finishing part of the machine, (Fig. 14) thereby locking and preventing the turning of the core, uhless the ring is in casting position on the core. A spring catch 105 is provided to hold the ring in position on the core. I also provide a wedge 106 having a lower slanting surface resting on the top slanting surface of a fixed cleat 107. The wedge is fixed by a bolt passing through a slot 108 in the wedge, so that it can be adjusted to raise and lower the tail sheet 99 held in the tail ring 97.

Having described the matrix supporting i Fastened to a seat 110 formed on thecbi i f" cave side of the core is a core turning bracket 1 111, having along slot or cam groove 112 which operates about a roller 113, mounted on a shaft 11 1, extending between the track supports. lVhen the outer end of the core is lifted byhand the .roller 113 and the 1,2se,sas

earn 112 control the turning movement thereof. The' seat on the frame C for the supports T8 of the core turning bracket 111 is provided with an opening 109, and between these supports and within the opening pivoted a roller carrying lever 115. This lever has extensions through which a short shaft 116 pas. on which shaft rollers .11? are n'iounted so as to rest upon the tracks 80 and thereby form a rolling COllllQLblOll between the said tracks and core. The roller lever 115 extends beyond the rollers and its lower portion provided with a long slot 118 which can. move over and about av roller 11f) mounted on a short stud "120 fastened in one of the track supports.

This arrangement of the rollers on a pivoted lever is for the purpose of supporting the core near, but not on, the center of gravity. The object is to have the core so balanced that the thick top end of a stereotype plate cast upon the core will over balance the core and assist in .turning it to horizontal position, but without a stereotype plate the core will have a tendency to turn toward the vertical position. This over balancing is greatly assisted through the rollers moving back and forth beneath its pivot point 114 as the core is moved on its rollers along the tracks,

In the horizontal position the core/is supported by the rollers 117. engaging the tracks, but to move it to vertical position it is neeess ry to seat the bottom end within the ring 70, on the ring support 71, lorated below the matrix supporting back, where upon the center of support rhanges from the pivot of the roller carrying lever to the pivot 72' of the end ring 70. Upon a further turning movement the rollers 11'? swing free from the tracks and the core, now resting on the end ring support, completes its turning movement into casting position within the matrix supporting back.

For the purpose of lorking the core in rusting position, a cam grooved plate 122 is mounted on the shaft 114 which extends through and between the track supports 78, and a roller 12 1 mounted upon the lower end of the core turning bracket- 111, enters the ram groove formed in the grooved plate 122, when the core becomes seated within the bottom ring; 70. The groove of the cam 122 is so shaped, that by turning an operating handle 125 on. the end of the shaft 114-, it will move the core into casting position, or out.

For the purpose hereafter described the cam groove is shaped so it may be turned further without moving the core after the core is in rusting position.

Altai-lied to each end of the shaft 114 are plate lifting: rams 126, whieh engage the plate lifter bars 96, as the core .is being turned to horizontal position and, as the lurnine continues, tow-z th lifter bars up and thereby lift the stereotype plate free from the surface of the core and support it in alinement with the finishing merhanism hereinafter des: ribed.

The opposite edge of the cam plate 1'22 is provided with a face (am 128. which operates a Combination of lovers. each time the core is turned to horizontal position, These levers in turn rause the matrix clamps to release the matrix held within the matrix sup porting back and also rause the clamps to swing on their pivols bax'k and out of the path of the sides of the stereotype plate carried by the core as the core turned out of the casting back' The mechanism \Vllllll I Show to cause this movement consists of a rock arm '0, pivoted near its center on one of the supports 78 and in a vertical position between the tracks. The upper end is provided with a roller 131 which engages the fare cam 128 and is always held in engagement by a spring To the lower end of the rock arm 130 is pivoted a pawl 131 which engages, when opening the matrix rlamp. a pivoted arm 135 (Fig. But when the core is turned into the back the pawl passes over the said pivoted arm 135, the pawl being provided with a beveled tooth 136 for that purpose. The pawl normally rests on a pin 13'? on the rock arm 130. The arm 135 is fastened on a short shaft 138, supported in brarket 139, attached to the underside of the base C. On the opposite end of the shaft 138 is a like arm 139, the top end of which is pivoted to one end of a link 1 10. The opposite end of the linkis pivoted to the upright arm of a three armed rock pie e 111. A seeond link 1&2 connects the said rock piece to one arm 1 13 or" a bell crank fastened on the lower end of one of the matrix clamp shat'ts 44. One of the arms 67 constitutes the other arm of this bell rrank. Through these connertions the matrix clamps are made to open, but owing to the shape of the cam groove in 122, operated by the core lockinghandle, the core remains stationary and in casting position during this operation of .is bein turned into casting position engage the loc. ing slide members 48 of the matrix clamps, forcing the core plate lifters back against t-heheads of the studs 94, and then force the jaws 56 from the full line position in Fig. 12 to the position in Fig. 13 to force the casting bars solidly against the edges of the matrix supporting bark, and also properly position the core and aline the edge of the plate lifters Within the casting chamber with the edges of the matrix jaws 50, oi" the matrix rl'amps. For the purpose of (losing the matrix clamps, I provide a. foot pedal 146 fastened to one end of a vertical rod 147, operating vertically in a bearing of a bracket 148 fastened on the interior of the base C. The opposite end of the rod is pivoted to one of the horizontal arms of the three armed rock piece 14:1 previously referred to. To the-third arm. also horizontal, I attach a like foot pedal H9 in like manner for the purpose of opening the matrix clamps, if desired, without turning the core.

Fastened on the short shaft 138 mounted in a bracket fastened to the underside of the base, is a third rock arm 150, which carries a spring actuated catch 151. positioned so as to be in the path of the roller 152, which is mounted on the lower end of the core turning bracket 111. When the core is turned to horizontal position, (the matrix clamps being in the open position.) the roller compresses the catch 151, and as the roller passes by the catch is forced forward and in the path of the roller. thereby locking or preventing the core being turned into casting position While the matrix bars are open, but the movement of the matrix clamps into the closed or casting position causes the arm 150, with the spring catch. to rock out of the path of the roller 152. which releases the core.

Having described the casting mechanism of my invention I will now explain the mechanism shown for shaving the ribs P cast on the concave surface of the stereotype plate P, the mechanism for cutting: off the rise and heveling that curved end. and the means for conveying the now finished stereotype plate from the finishing mechanism to the cooling mechanism F. all represented in a general way by the letter E (Fig. 1).

Mounted in three bearings 157 (Fig. 14). on the frames H and G is a longitudinal main shaft 158 operated from the motor K as will be explained hereinafter. Fastened to the main shaft and within the arch is a shaving knife 159 which extends lengthwise and is of a length slightly longer than the said arch, the said knife being so positioned as to engage and smooth off the faces of the ribs P cast on the stereotype concavity.

Positioned on the main shaft beyond the arch are adjustable plate stops 160 and 161 (Fig. 20) which engage ledges P cast on the side of the concavity of the riser of the stereotype plate and stop said plate in proper position when moved into the arch. from off the core. on which ithas been cast and hold the said plate from further latgiral movement until the lifters have raise. it against the dome of said arch. The stop 161 is spring actuated because the plate enters the arch out of horizontal alinement with the axis thereof and has to be moved sidewise and into axialv alinement when lifted up into the dome of said arch to position to he shaved. as wili appear hercina t ter. The main shaft is caused to make one revolution each time a trip is pushed down and leased to operate a clutch During the Beneath each straight side of the 164 are mounted supporting and tilt rollers 165 and beyond the arch out c by the main shaft by reciprocating studs lttti operating in bearings 16'! are a p of three rollers 168 (Fig. 16}. caused to move toward or away axis of the said main shaft by on each stud engaging in grooves a cam plate 171. The latter moves axially on the said shaft and is operated by it tionary face cam 1'72 fastened to the up bearing 157 of the main. shaft, through a connecting rod 173 a cam arm 1%. and a spring 175. (See i4, 18. i7 and The reason. for making the rollers more to ward the axis of the main shaft who it. shaft starts to revolve is to more-ti from under the edges of the riser o stereotype plate resting upon the S21 oilers within the arch. the movement being ancomplishcd by the end of :1 he cam arm. lid; moving out of the recess in the fixed fa e cam. Upon the finish, of the 'a'evi'ilui" 1 the main shaft the spring; 1'75 moi i the connecting rod moves tlii. left in Fig. 1-4- as thearm W4 pression in the cam 172. carries the canfplate 171 to the left and pushes the rollers out, and the rollers become a. support for the stereotype plate as it moves out of the arch and toward the cooling mechanism. 1. Beneath one side of the support isa mechanism for lifting the st plate into position against the As will be seen by the drawings me 165 which support the stereotype neath. one side of the arch. the arch beneath this t rollers 177 are located. The

frame at an aneiic and as the iin its also moves toward the axis of tn lip 182 18) formed on the the lifter en 'a cs in the e'roove P ca h r a the edge of the stereotype piste as the. ii'tter moves upward and forces at said stereo! plate to mote at the same angzl so that t plate side 

